Help with high Idle!!!
02-10-2012, 08:57 AM
#1
Help with high Idle!!! I'm having problems with my idle when the cars seems to warm up.
Here is the deal. On a cold start the engine with idle ok (around 600-700 rpms) until a few minutes then work its way up to 800-900rpms. Coolant is around 120* at this time. I then go around town and take the car for a spin. By this time the temp is at 185-190* which I figure is operating temp.
Now when I come to a stop sign, the idle will stay at around 3K rpm's!! I have to sit for about 20 seconds and then it will go down to 2K rpms, about 10 more seconds then it goes back down to normal idle. WHAT GIVES!?!?!
This is the motor thats in my '85 camaro and if it helps, it just has a flash tune from Mark Roman. ALSO, the idle set screw on the TB is about 3/4 all the way up because if I have it any lower, the car will not idle at all on cold start-ups.
Here is the deal. On a cold start the engine with idle ok (around 600-700 rpms) until a few minutes then work its way up to 800-900rpms. Coolant is around 120* at this time. I then go around town and take the car for a spin. By this time the temp is at 185-190* which I figure is operating temp.
Now when I come to a stop sign, the idle will stay at around 3K rpm's!! I have to sit for about 20 seconds and then it will go down to 2K rpms, about 10 more seconds then it goes back down to normal idle. WHAT GIVES!?!?!
This is the motor thats in my '85 camaro and if it helps, it just has a flash tune from Mark Roman. ALSO, the idle set screw on the TB is about 3/4 all the way up because if I have it any lower, the car will not idle at all on cold start-ups.
02-11-2012, 01:13 AM
#3
You need a tune.
Make sure you don't have vacuum leaks and your IAC is working properly.
The symptoms you describe mean you need tuning, it is a common issue easily solved with a little tuning knowledge and proper tools.
Make sure you don't have vacuum leaks and your IAC is working properly.
The symptoms you describe mean you need tuning, it is a common issue easily solved with a little tuning knowledge and proper tools.
02-15-2012, 10:12 AM
#5
Thanks guys, I'll have to save up some cash and get it tuned.
I did however, back down the idle set screw and unplugged the TPS and disconnected the battery for a while. After that, I started it up and seemed to be a little better. Idle still hangs up but only about 2K now and just for a few seconds.
I did however, back down the idle set screw and unplugged the TPS and disconnected the battery for a while. After that, I started it up and seemed to be a little better. Idle still hangs up but only about 2K now and just for a few seconds.
